Double species Bose-Einstein condensate with tunable interspecies interactions

Year: 2008

Authors: Thalhammer G., Barontini G., De Sarlo L., Catani J., Minardi F., Inguscio M.

Autors Affiliation: LENS – European Laboratory for Non-Linear Spectroscopy and Dipartimento di Fisica, Universita di Firenze, via N. Carrara 1, I-50019 Sesto Fiorentino – Firenze, Italy;
CNR-INFM, via G. Sansone 1, I-50019 Sesto Fiorentino – Firenze, Italy;
INFN, via G. Sansone 1, I-50019 Sesto Fiorentino – Firenze, Italy

Abstract: We produce Bose-Einstein condensates of two different species, 87 Rb and 41 K, in an optical dipole trap in proximity of interspecies Feshbach resonances. We discover and characterize two Feshbach resonances, located around 35 and 79 G, by observing the three-body losses and the elastic cross section. The narrower resonance is exploited to create a double species condensate with tunable interactions. Our system opens the way to the exploration of double species Mott insulators and, more in general, of the quantum phase
diagram of the two-species Bose-Hubbard model.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 100 (21)      Pages from: 210402  to: 210402

KeyWords: Electric insulators; Hubbard model; Optical systems; Phase diagrams; Resonance, Interspecies Feshbach resonances; Tunable interactions; Tunable interspecies interactions, Bose-Einstein condensation
DOI: 10.1103/PhysRevLett.100.210402

Citations: 331
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